404 
Surcato-fissurata, fissuris in anfr. ultimis evanescentibus. Regio 
umbilicalis longitudinaliter undulato-striata, sulcis radiantibus 
distantibus sigmoideis decussata. Rima poris oblongis irregu- 
laribus plerumque geminatim confluentibus, in anfr. 8 primis 
clausis; rima in anfr. ultimo aperta utrinque denticulata. 
Color albus, nebulis ferruginets. 
Long. 221 em., diam. circ. 6 mm. 
Operculum alveariforme (farinosum) pallide flavum, gyris 11, 
margine pulcherrime ciliato; area centralis parva saturate 
castanea nitida, obsoletissime impresso-punctata, late umbili- 
cata; segmentis radiantibus bullatis leviter flexis circiter 11, 
sulco profundo peripherico circumscriptis; lamina marginali 
latissima pallide flava. 
Diam. 4 mm., alt. 3 mm. 
Siliquaria anguina. Blainv. Man. t. 1. f.11? 
Hab. Ins. Philippin. (coll. Cumingii). Specimen unicum. 
Among the whorls are the remains of a sponge, with spiculz subu- 
late at both ends. 
Var. a. RUDIS. 
T. trochlearis, crassa, anfr. inferne planatis, umbilico pervio, 
liris granulis validis approximatis asperis. 
Long. 15 em., alt. aperturee 4 mm. 
Hab. Ins. Philippin. legit H. Cuming (coll. Dunkeri). 
Rumph. t. 41. no. 2? 
Var. 8. CONIFER. 
S. anguina, Chenu, Man. p. 321? 
T. valida, poris rotundis geminis rarius confluentibus. 
Diam. 5 mm. 
Operculum concavo-conicum, apice (casu?) truncato, gyris 13 ; 
area centralis lata, centro profunde et anguste umbilicato ; seg- 
mentis radiantibus 15 planatis, canali peripherico excavato 
circumscriptis ; lamina marginali angusta bipartita, annulo 
inferno castaneo, externo flavo. 
Diam. 33 mm., alt. 44 mm. 
This operculum differs from that of the type by its deep and rather 
narrow umbilicus, by its much larger central area, and by its nar- 
row marginal ring, which in the specimen appears damaged. The 
sides are concave, not convex, and the height is greater. The inter- 
stices of the whorls are in many places filled up with a chalky white 
matter. 
Whether these differences are of specific value, or depend on age 
or on long desiccation, I cannot judge, having seen only a single 
operculum of this variety ; I cannot discover important differences 
between the shells. 
Hab. Ins. Philippin., H. Cuming legit (coll. Dunkeri, specimen 
fractum). 
‘ 
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